fix: show rename form as topbar popup

[Isjuanplayer]

Closes #1148

IssueHunt: https://oss.issuehunt.io/r/BoostIO/BoostNote-App/issues/1148

Summary

• Open doc/folder rename forms from the topbar breadcrumb actions as small context popups anchored to the clicked action.
• Remove the folder rename submit button, matching the issue request to save with Enter or by leaving the popup.
• Save rename changes on Enter submit or when the input loses focus, with a guard to avoid duplicate saves when submit and blur happen back-to-back.

Verification

• npx tsc --noEmit --pretty false
• npx prettier --check src/cloud/lib/hooks/useCloudResourceModals.tsx src/cloud/lib/mappers/topbarBreadcrumbs.ts src/design/components/organisms/Topbar/atoms/TopbarActionItem.tsx src/design/components/organisms/Topbar/index.tsx
• npx eslint src/cloud/lib/hooks/useCloudResourceModals.tsx src/cloud/lib/mappers/topbarBreadcrumbs.ts src/design/components/organisms/Topbar/atoms/TopbarActionItem.tsx src/design/components/organisms/Topbar/index.tsx --quiet

Note: npm run lint -- --quiet still reports pre-existing CRLF prettier errors in src/index.tsx, which this PR does not touch.

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